Why do locals hate outsiders? Does "exclusion" only appear in first-tier cities?

Not necessarily a job opportunity. Not necessarily in first-tier cities. Of course, this problem is most prominent in first-tier cities. I think there are many reasons, as follows:

1. Because of the different qualities of China people, it is disgusting. For example, there are many foreigners, mixed fish and dragons, many incidents of theft, robbery and fighting, and social disorder, which makes local people very disgusted.

2. Due to the difference of living habits between local people and foreigners, local people don't like foreigners. Over time, they resent what foreigners do and have no good impression on foreigners.

3. The local people's sense of superiority, foreigners working here shows that your hometown is poor. Otherwise, what are you doing here? So the locals feel superior. (Shenzhen is such a phenomenon)

4. Outsiders go to work locally, so the population of the whole city rises, which leads to an increase in the flow of people and cars in the city, and also drives up the cost and price of renting houses. Locals find it noisy and crowded. This is a social operation problem, and many departments have no corresponding measures, which leads to exclusion.

5. Work problem. The salary of a certain occupation was not bad. Due to the increase of foreigners, fierce competition and reduced job opportunities, professional positions were cheap and income was reduced. Locals hated foreigners' invasion.

Conclusion: This is actually a social problem, which involves a wide range and cannot be simply summarized. There are causes and consequences, advantages and disadvantages, promoting economic development, leaving problems unresolved and leading to xenophobia. This is the same as China people going abroad, and people in many countries hate China people.